I am trying to fix an IP address for Azure Iothub via Load Balencer and HAproxy as suggested in this solution: Connection architecture I have configured the HAproxy as suggested to pass the SSL handshake to the server:
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# Default ciphers to use on SSL-enabled listening sockets.
# For more information, see ciphers(1SSL). This list is from:
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
# An alternative list with additional directives can be obtained from
# https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=haproxy
ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS
ssl-default-bind-options no-sslv3
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http frontend haproxy_iothub
bind *:8883
bind *:443
bind *:5671
mode tcp
default_backend iothub
backend iothub
mode tcp
server iothub [Server URL]:8883 check
server iothub [Server URL]:443 check
server iothub [Server URL]:5671 check
To simulate the device, I used Azure V2 SDK (azure-iot-device) and defined a proxy option and created a client from a connection string.
proxy_opts = ProxyOptions(proxy_type=socks.HTTP, proxy_addr="Proxy_ IP", proxy_port=8883)
device_client = IoTHubDeviceClient.create_from_connection_string("IOTHUB_DEVICE_CONNECTION_STRING", websockets=True, proxy_options=proxy_opts )
I was not able to reach the iothub, I tried debugging the library to get more information and it turned out that the blocking occurs due to a general proxy error ("connection closed unexpectedly") in _negotiate_HTTP. socks.HTTPError :504 : Gateway Time-out (in socks.py)
HAproxy logging showes :
Oct 18 08:48:37 vmss2xigg000000 haproxy[27470]: *..:59000 [18/Oct/2021:08:48:37.451] haproxy_iothub iothub/iothub1 1/1/38 0 -- 1/1/0/0/0 0/0
Any help much appreciated
HA-Proxy version 1.8.8-1ubuntu0.11
Azure-iot-device Version 2.8.0
